Christopher P. Bonvillain

Relative Abundance and Biomass Estimate of a Spotted Gar Population in a Seasonally Connected Large River Floodplain Lake

In order to assess the change in spotted gar (Lepisosteus oculatus) density relative to water level in a disconnected low-water refuge, we used monofilament gill nets to collect adult gar throughout the annual flood pulse in the Atchafalaya River Basin (ARB), Louisiana. Spotted gar density was greatest during low-water periods and there was a strong negative correlation between spotted gar catch per unit effort and the Atchafalaya River water level at Butte La Rose (P = 0.0002, R2 = 0.5763). The spotted gar population in Deer Lake, a disconnected backwater area, was estimated to be 2,079...

Year
2008